package com.itheima.integer.demo;

public class MyIntegerDemo01 {
    public static void main(String[] args) {
        Integer i1 = 100;
        System.out.println(i1);
        int i2 = i1;
        System.out.println(i2);
        i1 += 100;
        System.out.println(i1);

        int i3 = i1.intValue();
        System.out.println(i3);

        Integer i4 = null;
        if (i4 != null) {
            i4 += 200;
            System.out.println(i4);
        }
    }
}
